In this situation why is grave Titan better? Grave titan is not a zombie so grave crawler can't be cast from the grave yard with only Titan on the field, with mikaeus out it beats done humans which are pretty big now in the meta, and giving all zombies undieing is really good since all the creature are zombies in the deck.

Mikeus is a dead card against any other deck and is not that huge of a board presence than GTitan. He come into play with 2 zombies and creates 2 zombies is huge for your deck. Also undying doesnt effect tokens since they never hit the graveyard.

gftt=go for the throatalso grave Titan is not even close to as good as mikaeus because mikaeus is a 5/5 intimidator that destroys humans and gives all zombies undying. Grave Titan does not have enough benefits.